Operator's manual for the 22-547 is
here.
It sounds like you may need to adjust the knives. Page 10 and 11 of the operator's manual discuss the details. See below: (I have removede references to the figure and diagrams in the manual - look there for pictures).
ADJUSTING KNIVES
To check and adjust the knives, proceed as follows:
1. DISCONNECT THE TOOL FROM THE POWER SOURCE.
2. Lower the head assembly by turning handle
3. Remove chip deflector
4. Carefully place knife setting gage, on the cutterhead so the rounded sections are directly over the knife as shown. When adjusted correctly, the knife should just contact the bottom of the center portion at each end of gage. Check the other knife in the same manner.
5. If an adjustment to one or both knives is necessary, slightly loosen the seven locking screws, by turning the screws CLOCKWISE into the knife locking bar just enough to relieve stress in the cutterhead and not disturb the knife setting.
6. With setting gage, in place, apply pressure to the knife being reset. Turn the seven knife locking screws, CLOCKWISE until the knife locking bar becomes loose. Lift springs will automatically raise the knife until it comes in contact with gage. Snug the knife locking bar by lightly turning the seven locking screws, COUNTERCLOCKWISE.
IMPORTANT: AT THIS TIME, ONLY TIGHTEN THE KNIFE LOCKING BAR JUST ENOUGH TO HOLD THE KNIFE IN POSITON INSIDE THE CUTTERHEAD SLOT.
7. If the other knife needs adjustment, repeat STEP 6.
8. After both knives are positioned in the cutterhead, turn each of the seven screws, COUNTERCLOCKWISE until the knife is secure in the cutterhead. NOTE: When tightening knife locking screws, tighten the end screws first, then inward toward the center of the cutterhead.
9. Replace chip deflector.